That's a scaring idea (not impossible, we don't know how future will be like), I think that a lot of things would change. For example, I think that we would use less time for studying and start working earlier. And you should have your first child with 20 years or something like that if you want to take care of him until becoming an adult. I can't imagine... We would realize that we couldn't turn in to reality all our plans and, so, we would have to choose the more important (essential), maybe we would give more value to time and do most of what we really love. And I think I would have fear to die very soon, like nowadays people with 80 years have, some feel... Like... One day they can simply die. It's a kind of "waiting", a constantly worrying. Well, I confess, I am a teenager now and I have fear of future... Our planet is, each day worst. It's not a problem to the next generations.